Purchased for use in an inboard v 6 boat engine. Great oil for this application.

Love this oil, the full synthetic oil I was using can not even hold a candle to AMSOIL. The engine runs so smooth and much more quietly : ) I also went from a 5w30 to the 10w40 for the summer, will change back to the 5w30 for the winter. When I'm ready for a transmission fluid change I'm changing over to AMSOIL too. Richard

Product does wonders in the evo. The turbo requires high zinc so this does the job.

This Amsoil Motor Oil is used in a track car that constantly see's high RPM pulls on a road race course. Works well and oil temps seem to stay steady throughout a 20-30 minute session. Am pleased with the product and will continue to use it. It's what I would call "cheap insurance".

The Amsoil high zinc formula is all i use in my bbc. This oil holds up to the heat and high compression of my street/strip motor.

I will continue to purchase nothing but AMSOIL for all our lubrication needs. Classic cars, snowmobiles, 4 wheelers, and our daily drivers. Gas and diesel. And dont forget the boats. It's one place for everything, shipped to my door.

Dad wanted an upgraded oil in his new F250 and I knew this company produces the best oil and I also run this in my Dixie chopper.

Great oil for my diesel pickup.

Great oil for street and track. Got my 996 oil analysis back after 6 months, multiple track days and of course...perfect results! Keep up the great work!

This oil is used in an extreme situation. Been a customer for years. No issues or failures

I changed from the boosted version which lowered my my oil pressure way to much. Now my oil pressure never drops below 40 psi. With the boosted version it dropped to the 25 psi.

I've been using this oil for 10 years in my 1995 BMW 325 which is a track/race car only. I put about 2000 miles a year on it and change the oil once a year. The engine is very happy runs like a top and I have 125,000 miles on it.

I'm 65 years old and have been into automotive lubricants since I was a teenager. Out of all of the Automotive lubricants I have purchased and tested over the years. Nothing surpasses Amsoil products. Unlike most, I still change my engine oils at 3000 miles. That being said, I own a 1988 BMW M5 with almost 200K miles which still runs like it just rolled off the show room floor. There are many other brands and types of oils I consider to be excellent but nothing come close to Amsoil. It's the most trust high grade lubercants I have found to date and will NOT use any other brand.

I put this in my 2002 base model Corvette, and: -became the overall Top Eliminator at the NCCC convention 2017. (although I'm not a drag racer) -Finished 2nd in Autocross. -Set at track record at Putnam Park race way. -Ran all day - two days in a row- at a track event at NCM. with all the things to worry about when racing a street car, I can check Oil and Engine concerns off the list.

My modified Subaru makes over 100 hp per cylinder so I need a very stout oil. This stuff pours like water, but has a very high viscosity at high temps. It also has loads of zinc and phosphorus which makes it perfect for high horsepower applications, turbo engines, and american hot rods.

350,000 miles on 98 Chevy, started using in the 90,000, don't have to worriy about oil changes , being over due.

Previously used Mobile 1 for years, but the specifications changed over time and didn't meet the GM specs for the engine. I transitioned to Amsoil and the engine ran even quieter and I know it's getting the proper lubrications that GM intended for the DOHC LT5.

Wonderful oil for older engines that can use it. I routinely run it for years at a time in my tractor and pickup. Neither uses any oil.

There are no other decent high-quality 20W50 oil products around for this price. Cannot think of a better value, at least on West Coast. Engine runs just as dependably, even out of a tire slide, as when brand new.

The filler spout is too big to fit all of my bikes cars & trucks. Like the oil.